Spark arrestors on tuned saws?

[marshallr]

I'm sold on the concept of a tuned 357xp. It seems that the big three (D, G & W) can really make a saw run stronger, cooler and longer. I just really don't want to get a HUGE bill for burning down a forest by running a saw without a functional spark arrestor.

marshallr

 

[dbabcock]

My 3120 KD has an extra port cut in the front of the muffler, but it also has a spark arresting screen in it.

 

[Dennis]

Marshall...yes..there are a couple of ways that the muffler can be converted and still maintain spark arrestors, Ken Dunn has perfected them and I copied...

 

[kdhotsaw]

muffler screens

hello marshall,
You bring up a good point on having the screens installed on a muffler with a extra exhaust port. a few years back we used to just cut 2 extra holes in the front of the mufflers, then we put 2 pipes in the mufflers. both methods worked but if you were cutting close to the logs you were always putting out burning embers. also the forestry really hassled the fallers when they saw the mufflers modified that way. we have changed to a single extra port in the front of the muffler. we also install the screens. you get no loss in performance with screens installed. I've tested them both ways. the important thing is to have the ports the right size. there is a point where the port size is correct, if you go to big the power begins to fall off also. there is a picture of a 385 husky muffler I modified on the muffler mods thread on page 2 of the arborstsite threads, the 12th post down. it will give you an idea of how the extra port looks. the forestry never questions a muffler modified this way. they think it came from the factory that way.
the 357 is a great saw to modify, its the only husky that comes with a full circle crank and it also has the quad transfer ports. good choice. e-mail me if you want a price quote on the engine mods. the muffler mods are 50.00
ken
[email protected]
530-589-2744

 

[dbabcock]

Not being a professional woodsman, I've never experienced a visit from representatives of the Forestry Bureau or whatever it's called. Do certain forestry "cops" run around inspecting your equipment and conditions when you're out in the woods working?
Like, all of a sudden you turn around and some guy is writing you a citation for a chainsaw that's too loud or a skidder that he thinks needs new brake linings or tires? I imagine that this could get to be a real pain in the a$$!

 

[kdhotsaw]

forest service employees

Hello DB,
yes if you log in california you have to be on the lookout for the p#ss fir willies, if your strip you are falling is on government land they be there checking you and your saw out. we had to have our saws inspected and tagged a few years back but now they just come out and make sure our saws are ok. they also check to see if the fallers have their portable fire extinguisher, thier shovel, and other mandatory falling equipment. then you have to deal with the CDF, the california dept of forestry. we had a fire start last summer and the loggers from the area had contained it when the cdf showed up . the fire had burned about 600 acres. well anyway the cdf lit a backfire just in case. well you know the rest of the story. the backfire got away and burn't an additional 21,000 acres. To much college theory, not enough practical experence.
ken

 

[dbabcock]

Yoda...er Ken,
That must really suck having those self-proclaimed genius's hounding hard working guys all the time. I run into that kind of $hit everytime I walk into work!